A Highly Integrated Automatic Fiber Optical Gyroscope Sensing Coil Winding System
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ISSN:1598-6446 eISSN:2005-4092 http://www.springer.com/12555
A Highly Integrated Automatic Fiber Optical Gyroscope Sensing Coil Winding System Shuang-Chao Ge*, Rui-Feng Yang, and Chen-Xia Guo Abstract: Fiber optic gyroscope (FOG) is a new type of optical sensor used to measure the rotating angular velocity. As the core component, fiber optic coil (FOC) plays a decisive role in the FOG output precision. The manufacturing level and efficiency of FOC have been main factors restricting the application and development of high precision FOG. Precision mechanical positioning method based on the photoelectric devices was researched, and high-performance fully automatic micro mechanical error compensation technique was developed. On these basis. automatic fiber distribution and winding control technology were realized. Eventually a multifunctional system was developed with fiber splitting module, fiber winding module, and calibration module. This system could accomplish automatic preparation of FOC with quadrupolar symmetric pattern according to the parameters set by user. The principle and working flow of each functional module are discussed in details. Experiments show that the system can achieve automatic speed changing, automatic reversing, constant small tension control and precise fiber arrangement. The new designed system greatly improve FOC production efficiency and is conductive to promoting high level FOG development. Keywords: Automatic control, fiber optic coil, mechanical structure, micro mechanical error compensation.
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INTRODUCTION
The fiber optic gyroscopes (FOG) is a new designed sensor for the space inertial rotation rate measuring based on the Sagnac effect [1]. FOG is applied comprehensively in military and civil inertial navigation field because of the advantages of high reliability, long continuous operation life, wide dynamic range, light weight and small volume. Because of the important strategic and economic significance of FOG, all nations around the world make an emphasis on high-level FOG development. Some representative products are listed in Table 1. As the core sensitive element of FOG, fiber optic coil (FOC) is made of polarization maintaining optical fiber winded in a specific way on the fiber optic ring skeleton. The stability and anti-interference ability of FOC directly affect FOG performance and hinder the FOG from development towards high precision and high reliability. FOG products and production system have been widely used, but high level FOC preparation technologies have increased relatively modestly, which restricts the development and application of FOG. Owing to complex operation and lower efficiency [2–5], there are several com-
Table 1. Performance comparisons of different FOG sensors. Country Manufacturer USA France Germany Russian Japan
Honeywell IXSEA LITEF Fitzoptika MPC
Bias instability (◦ /h)
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